Milton



(No Model.) I I M. O. REEVES SPLIT PULLEY.-

No. 419,557. Patented Jan, 14,1890.

a I a UNITED STATES PATENT OFFICE.

MILTON O. REEVES, OF COLUMBUS, INDIANA, ASSIGNOR TO THE REEVES PULLEYCOMPANY, OESAME PLACE.

SPLIT PU LLEY.

SPECIFICATION forming part of Letters Patent No. 419,557, dated January14, 1890.

Application filed April 27, 1889. Serial No. 308,780. (No model.)

To aZZ whom it may concern.-

Be it known that I, MILTON O. REEVES, a citizen of the United States,residing at O0- lumbus, in the county of Bartholomew and State ofIndiana, have invented a new and useful Improvement in Split Pulleys, ofwhich the following is a specification.

My invention relates to an improvement in that class of wooden splitpulleys having a central separable web, as distinguished from thosehaving spokes or arms, and having its face extended by an annular flangesecured to one or both sides of the web. I In this class of pulleys theweb is built up of two or more thicknesses of semicircular pieces ofwood arranged with their grain crossing at substantially right angles,two like sections being formed, each having projecting portions whichoverlap when the two sections are placed together to form a completecircle.

It has been found in practice that the swelling and shrinking in thedirection of the width of the pieces which make the web of the pulley,while they do not correspond ingly change in direction of their length,soon destroy the trueness and smoothness of the periphery.

The objects of my improvement are to prevent the changing of theperipheral surface by the shrinking and swelling of the-web-se ments.

The accompanying drawings illustrate my invention.

For convenience in showing the improve ment, the figures represent apulley having an annular flange on one side only of the web.

Figure 1 represents a side elevation of the two like sections which formthe pulley, separated, that side being shown on which there is noflange. Fig. 2 represents an elevation of the opposite side of thepulley when complete. Fig. 3 represents a section through the center ofthe pulley:

Each of the pulley-sections is formed of two semicircular pieces A andB, secured together side by side and having their straight edgesarranged to cross each other centrally and at a right angle. The grainof each piece runs substantially parallel with its straight edge. Beforepieces A and B are fastened together an annular slot 0, substantiallyparallel with and a short distance from the periphery, is formed in eachpiece. Said slot 0 is for the purpose of cutting off immediateconnection between the central portion of the piece and its peripheryalong the wider parts of the piece, By this construction the shrinkingand swelling of the central portion of the pulley are prevented fromchanging the contour of the periphery.

For the purpose of concealing slots 0 in the finished pulley, thesegmental annular flange D is made wide enough to form a fillet e whichcovers the slot, the flange being secured, however, only to that portionof the web which lies outside the slot, and the fillet lapping over theslot and the central portion of the web without being fastened thereto,thus covering the slot, but permitting a free movement of the centralportion of the web.

For the purpose of strengthening the central portion of the web andproviding a convenient means for clamping the two sections together, Isecure to each section on opposite sides a pair of rectangular blocksorhubs F F and G G. Each of said blocks F and G on its outer face has apair of grooves h h, which register in the opposed blocks and areadapted to receive on opposite sides of the center of the pulley a pairof bolts 11 2'. After the two sections have been put together the bolts2' i are dropped into the grooves, and, their nuts being screwed up, thetwo sections are $6- curely bound together. When secured together, thecentral opening J is bored out to receive the shaft or a bushing, bywhich the pulley is secured to the shaft in a well-known manner. 7

I claim as my invention 1. In a wooden split pulley, two similar independent sections or parts, each of which is formed by lapping togethersemicircular pieces with their straight edges crossing each othercentrally and each of which is provided with a segmental annular slotformed therein, substantially as and for tlie purpose specified.

2. In a wooden split pulley, two similar independent sections or parts,each of Whieh is to overlap the slots, substantially as and for formedby llapping tlogether semicircular the purpose specified.

ieces wit 1 t ieir strai" it ed es erossin each w Ether centrally, whichpiee es are each pi'o- MILTON 5 vided with the segmental annular slot 0,and Vitnesses:

the annular flange secured to said se1nieireu- CHARLES F. REMY, lai'pieces outside of said slot and arranged MARSHALL TIOOPER.

